I've seen a video on youtube with a macbook air doing this. I guess as long as there's a thunderbolt port, it is doable. But not a good solution, nevertheless, for plenty of reasons compared to a dedicated gaming PC.

It's doable, but as far as I know under OS X very finicky to pull off, since you have to edit kernel extensions. It's apparently easier under Windows, but given the price of the required external PCI card housings, you'll probably be better off with a reasonably priced dedicated Windows gaming PC, as antonis said.

I would be in agreement also that the external GPU option is not really worthwhile. Technical considerations aside, the expense is so high that building an upgradable gaming PC would be a much better investment over the long haul.

Most people with soldered GPUs in their gaming laptops would happily pay $500 to upgrade if they could (LOL new Alienwares), and i7 laptops are really not that much of a bottleneck if you get a card like a 960 GTX. So I think this is a nice option to have.

I am happy people are finding a use for TB. Apart from mDP functionality I never use mine.

Most people with soldered GPUs in their gaming laptops would happily pay $500 to upgrade if they could (LOL new Alienwares), and i7 laptops are really not that much of a bottleneck if you get a card like a 960 GTX. So I think this is a nice option to have.

I am happy people are finding a use for TB. Apart from mDP functionality I never use mine.

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500 sounds fine. I prefer not to pay like 800-1000 for whatever it is for a new comp.

Im concerned is it tough to set up for an averge computer user? Is there a lot that can go wrong?

You should read the TechInferno forums. An eGPU can be great under Windows to play games. Depending on the type of GPU that you use it might also work under OS X. But it is not a cheap solution. My eGPU costs about the same as a dedicated game PC. I also used a mini-ITX computer case to hide all the components. You can check it out here. The CPU in my 13" rMBP is a bottleneck because it is only a dual-core chip.

Take also into account that an external screen is sometimes necessary. Especially if you buy the rMBP with dedicated graphics card (AMD or Nvidia).

If it ever becomes truly viable, it will be with Thunderbolt 3 and beyond and not with the Thunderbolt 2 you have on that system. That said, you can build a Windows system viable for gaming for not too much more than what an external GPU would cost you and frankly, it's a neater solution than having to Boot Camp.

So I've been looking at this for exactly the same MacBook Pro. I have a setup I really like with an LG 34um95 and a caldigit TS2 dock. One thunderbolt cable (plus the power cable) connects me to the screen, Ethernet, a mouse, keyboard and an external drive.

I can play games on this setup and it's fine but I generally have the settings low and the resolution set below the true screen resolution. An eGPU would be a dream if it was plug and play and a reasonable price but having looking into it the cost is high, it limits you to dated gfx cards in macOS and looks like it could be troublesome to get working.

As an alternative I'm considering a headless Steam in home streaming server running windows and hiding that out of the way in another room. The advantage is it's much easier to upgrade, zero limits on what parts I can use and I can continue to use my setup as I like it now... Uncluttered and portable when required.

Again the cost of building a dedicated gaming PC is high, I'm looking at about £1,000, but spending around £600 to £700 on an eGPU is a bigger risk as far as I can tell. I also have an Nvidia Shield under a TV so a dedicated PC would open up that for proper gaming as well.

I do think eGPU with thunderbolt 3 has huge potential. I just can't see Apple being keen anytime soon.

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